This book brings together selected essays on European Business Interest Associations (BIAs) as important components of European social and economic development over the last 150 years. The studies were originally presented at the 2012 World Economic History Congress, organized in association with an international research programme on BIAs in Europe. They adopt a historical research methodology with the aim of updating previous scholarship from within the social sciences; they also look at a number of different European countries, allowing for a comparative approach. They explore the roots and identity of BIAs, analyse their activities and examine their financing sources and strategies. Some essays discuss the decline of the old system of craft guilds and the emergence of new forms of economic organization and representation: new BIAs had to contend with the development of the trade unions and the growth of state economic interventionism and so they progressively increased their activities in order to serve European companies. Other essays present specific national examples of the evolution of BIAs throughout the twentieth century and also look at the development of Eurofederations.